Why are people arguing over Zain Malik's ethnicity / race?

Zain Malik is from Bradford, I know him (well have seen him around but I know his cousins etc) - he is a good looking lad and has got a lot of attention (obviously if you check his name on google you will know what I mean).

Anyway I was shocked when I go on youtube and people are arguing about his race/ethnicity? He is half Pakistani/ Half white? Obviously by his looks, he looks like a lighter skinned Pakistani and obviously his skin color as well - but many people are saying he looks white?

Zain Malik:

http://images.sugarscape.com/userfiles/image/NOVEMBER2010/Amy/ZainMalik.jpg

Pakistani's:

http://www.muskurahat.us/modeling/male/images/large/malemodels07.jpg

http://arcticboy.arcticboy.com/view.php?q=Pakistani%20Male%20Models%20Pictures&url=http://img223.imageshack.us/img223/1622/haribmaiinhl6oi8.jpg

http://www.jurgita.com/images_new/models/M/other/w422xh450/rizwan-butt-291850-351780.jpg

White English people:

http://famewatcher.com/wp-content/uploads/2009/09/Sam-Handley.jpg

http://www.topnews.in/files/David-Beckham_7.jpg

Obviously in general he looks Pakistani, why have people made such a big issue out of his race/ethnicity in the first place?